Home / 12,457.02-17,180.97-7,981.20

Finding the Fourth Proportional to 12,457.02, 17,180.97 and 7,981.20

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Solution

The fourth proportional to 12,457.02, 17,180.97 and 7,981.20 is: 11,007.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,457.02 : 17,180.97 = 7,981.20 : x
  2. Step 2: Convert to fraction form
    12,457.02/17,180.97 = 7,981.20/x
  3. Step 3: Cross multiply
    12,457.02x = 17,180.97 × 7,981.20
  4. Step 4: Simplify right side
    12,457.02x = 137,124,757.76
  5. Step 5: Solve for x
    x = 137,124,757.76/12,457.02
  6. Step 6: Final answer
    x = 11,007.83

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.